Do you mean pre-canned SQL queries in the Designer?
Not supported too.
Form your last questions it seems that you want to write SQL code by hand, either with SPs or in the Designe, correct?
Why would you do that and use ORM tool at the same time.
The idea behind an ORM tool is that it automates the SQL code writing so you don't have to write them, and the most importantly won't have to manitain them when your model changes.